I run one on my bike. The tach feature doesn't work worth a #$%*. The RPM's hop all over the place, meaning you can't set the shift points to light up. I have since unhooked the tach wire

If I had to do it all over I would buy the lesser priced version that is a speedo only. I fashioned a metal bracket to mount my pick up cable and then drilled a deep divot in between two of the webs of my rotor for the magnet to rest in. The magnet has stayed in place for 3.5 years without a problem, the unit itself is weather proof, mine has lived outside since I installed it. They are tough as nails.